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Old 06-12-2013, 08:00 PM   #1
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Default mercedes sprinter 312d diesel problems

when driving my mercedes sprinter drives perfect until it comes to steep hills then cuts out completely after 10 seconds it starts sometimes it will stop a number of times running perfect on flat changed desel filter makes no difference can not see any air in pipes going to fuel pump any ideas please
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Old 06-12-2013, 10:19 PM   #2
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Default Re: mercedes sprinter 312d diesel problems

Any chance of some punctuation so I can figure out what the symptoms are?

Could it be related to the fuel pickup in the tank?
How does it cut out, does it lose revs first and stall or just stop suddenly like a computer or electrical cut out?
How is the temperature gauge? Do you get any warning lights when it cuts out?
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Old 06-13-2013, 01:33 AM   #3
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Lightbulb Re: mercedes sprinter 312d diesel problems

This forum is a good source for information by using the search function.

Another option is to call Doktor A (Andy Bittenbinder), the authority on Sprinters based on many threads in this forum (412-366-6165).

We are new to the Sprinter family and have not had any issues yet but are fortunate enough to live two miles from Dr. A if / when we begin to have problems.

Good luck.
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Old 06-13-2013, 11:46 AM   #4
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Default Re: mercedes sprinter 312d diesel problems

Unfortunately the engine used in the 312D was never available in a US Sprinter so Dr A's knowledge of them may be limited, on the other hand the problem might be something common to any diesel engine, and a version of it it was used in cars in the US.

My gut feeling though, is that someone in the UK will know the answer, but maybe not me!
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Old 06-13-2013, 12:10 PM   #5
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Default Re: mercedes sprinter 312d diesel problems

Thanks for the replies
The van cuts out completely but only on hills???
drives good on the flat
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Old 06-13-2013, 12:13 PM   #6
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Default sprinter van cuts out on hills

mercedes sprinter van s reg
drives perfect on flat, but cuts out on hills
any ideas please
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Old 06-13-2013, 01:18 PM   #7
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Default Re: sprinter van cuts out on hills

What do you mean by "cuts out". Do you mean that the engine stops running or do experience a reduced power or LHM Limp Home Mode situation that slows you down?

If power reduces and the engine keeps running, often the problems which surface during long climbs trace to leaks in the charge air system. The hoses would be my first thing to check. Sometimes air leaks can be difficult to find so look carefully at the hoses for signs of oil residue. vic
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Old 06-13-2013, 01:55 PM   #8
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Default Re: sprinter van cuts out on hills

Also, are you just putting your Sprinter in "D" and letting it upshift automatically to 5th gear (OVERDRIVE 0.83:1) and then heading up a hill, hoping it will downshift automatically to 4th gear on it's own?
Doing this runs the % engine load to 100%....the fueling rate to the maximum possible (> 3X what is needed @ half throttle)....and the turbo boost to the maximum possible (> 20.5 PSIG/ > 35.0 PSIA).
How many RPMs are you running when it cuts out? <2400......>2800.....~3200 where your Sprinter makes it most efficient and maximum power?
Might try manually downshifting to 4th gear as you start up the hill and make sure the RPMs are up in the 2800-3200 range.
This will reduce the % engine LOD.....fueling rate....and turbo boost pressure. If this prevents the engine from faulting out/shutting off, then you need to have the diagnostics run to determine which system has the fault and which sensor is going out of range.
There are many sensors on your engine that must stay in a range for a given % engine load and RPM.
If any of these sensors report to the ECM as "out of range" or implausible, the ECM will either shut your engine off completely, or put you in a reduced power state (Limp Home Mode).
Best thing to do is find someone with the correct diagnostic tool and see what codes are stored.
Each time it shuts down, there will most likely be a code stored and the codes can be traced to particular sensors or systems where the problem lies.
As suggested, a high pressure turbo boost leak (cracked turbo resonator, cracked or split hose, loose hose clamp at a joint) is one of the most common failure modes.
I had a 2006 Dodge T1N (OM-647 engine) that would simply go "POP" and shut off. Did a lot of diagnostics, changed the ECM (PCM in a Dodge) but never really solved the problem. Most of the parts changed out were covered by the warranty (even @ ~ 85 K miles).
Hope this helps,
Roger
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Old 06-13-2013, 04:36 PM   #9
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Default Re: sprinter van cuts out on hills

stops completely up hills
have noticed air going back through return when going up hill
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Old 06-13-2013, 04:43 PM   #10
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Default Re: mercedes sprinter 312d diesel problems

have now found air going back through return when going up hills then stops completely any help would be great thanks
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